According to the Alzheimer’s Association, an estimated 5.7 million people in the United States live with dementia. However, a new analysis out of John Hopkins Medicine reveals that nearly 60 percent of older adults with probable dementia are either undiagnosed or unaware of their diagnosis.

“If dementia is less severe and people are better able to perform day-to-day tasks independently, symptoms of cognitive loss are more likely masked, especially for patients who visit the doctor...